mirror of
https://github.com/RPCSX/llvm.git
synced 2024-12-10 13:15:47 +00:00
4ee451de36
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45418 91177308-0d34-0410-b5e6-96231b3b80d8
172 lines
6.1 KiB
C++
172 lines
6.1 KiB
C++
//===-- TargetMachine.cpp - General Target Information ---------------------==//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file describes the general parts of a Target machine.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/Target/TargetAsmInfo.h"
|
|
#include "llvm/Target/TargetMachine.h"
|
|
#include "llvm/Target/TargetOptions.h"
|
|
#include "llvm/Support/CommandLine.h"
|
|
using namespace llvm;
|
|
|
|
//---------------------------------------------------------------------------
|
|
// Command-line options that tend to be useful on more than one back-end.
|
|
//
|
|
|
|
namespace llvm {
|
|
bool PrintMachineCode;
|
|
bool NoFramePointerElim;
|
|
bool NoExcessFPPrecision;
|
|
bool UnsafeFPMath;
|
|
bool FiniteOnlyFPMathOption;
|
|
bool HonorSignDependentRoundingFPMathOption;
|
|
bool UseSoftFloat;
|
|
bool NoZerosInBSS;
|
|
bool ExceptionHandling;
|
|
Reloc::Model RelocationModel;
|
|
CodeModel::Model CMModel;
|
|
bool PerformTailCallOpt;
|
|
}
|
|
namespace {
|
|
cl::opt<bool, true> PrintCode("print-machineinstrs",
|
|
cl::desc("Print generated machine code"),
|
|
cl::location(PrintMachineCode), cl::init(false));
|
|
|
|
cl::opt<bool, true>
|
|
DisableFPElim("disable-fp-elim",
|
|
cl::desc("Disable frame pointer elimination optimization"),
|
|
cl::location(NoFramePointerElim),
|
|
cl::init(false));
|
|
cl::opt<bool, true>
|
|
DisableExcessPrecision("disable-excess-fp-precision",
|
|
cl::desc("Disable optimizations that may increase FP precision"),
|
|
cl::location(NoExcessFPPrecision),
|
|
cl::init(false));
|
|
cl::opt<bool, true>
|
|
EnableUnsafeFPMath("enable-unsafe-fp-math",
|
|
cl::desc("Enable optimizations that may decrease FP precision"),
|
|
cl::location(UnsafeFPMath),
|
|
cl::init(false));
|
|
cl::opt<bool, true>
|
|
EnableFiniteOnlyFPMath("enable-finite-only-fp-math",
|
|
cl::desc("Enable optimizations that assumes non- NaNs / +-Infs"),
|
|
cl::location(FiniteOnlyFPMathOption),
|
|
cl::init(false));
|
|
cl::opt<bool, true>
|
|
EnableHonorSignDependentRoundingFPMath(cl::Hidden,
|
|
"enable-sign-dependent-rounding-fp-math",
|
|
cl::desc("Force codegen to assume rounding mode can change dynamically"),
|
|
cl::location(HonorSignDependentRoundingFPMathOption),
|
|
cl::init(false));
|
|
|
|
cl::opt<bool, true>
|
|
GenerateSoftFloatCalls("soft-float",
|
|
cl::desc("Generate software floating point library calls"),
|
|
cl::location(UseSoftFloat),
|
|
cl::init(false));
|
|
cl::opt<bool, true>
|
|
DontPlaceZerosInBSS("nozero-initialized-in-bss",
|
|
cl::desc("Don't place zero-initialized symbols into bss section"),
|
|
cl::location(NoZerosInBSS),
|
|
cl::init(false));
|
|
cl::opt<bool, true>
|
|
EnableExceptionHandling("enable-eh",
|
|
cl::desc("Exception handling should be emitted."),
|
|
cl::location(ExceptionHandling),
|
|
cl::init(false));
|
|
|
|
cl::opt<llvm::Reloc::Model, true>
|
|
DefRelocationModel(
|
|
"relocation-model",
|
|
cl::desc("Choose relocation model"),
|
|
cl::location(RelocationModel),
|
|
cl::init(Reloc::Default),
|
|
cl::values(
|
|
clEnumValN(Reloc::Default, "default",
|
|
" Target default relocation model"),
|
|
clEnumValN(Reloc::Static, "static",
|
|
" Non-relocatable code"),
|
|
clEnumValN(Reloc::PIC_, "pic",
|
|
" Fully relocatable, position independent code"),
|
|
clEnumValN(Reloc::DynamicNoPIC, "dynamic-no-pic",
|
|
" Relocatable external references, non-relocatable code"),
|
|
clEnumValEnd));
|
|
cl::opt<llvm::CodeModel::Model, true>
|
|
DefCodeModel(
|
|
"code-model",
|
|
cl::desc("Choose code model"),
|
|
cl::location(CMModel),
|
|
cl::init(CodeModel::Default),
|
|
cl::values(
|
|
clEnumValN(CodeModel::Default, "default",
|
|
" Target default code model"),
|
|
clEnumValN(CodeModel::Small, "small",
|
|
" Small code model"),
|
|
clEnumValN(CodeModel::Kernel, "kernel",
|
|
" Kernel code model"),
|
|
clEnumValN(CodeModel::Medium, "medium",
|
|
" Medium code model"),
|
|
clEnumValN(CodeModel::Large, "large",
|
|
" Large code model"),
|
|
clEnumValEnd));
|
|
|
|
cl::opt<bool, true>
|
|
EnablePerformTailCallOpt("tailcallopt",
|
|
cl::desc("Turn on tail call optimization."),
|
|
cl::location(PerformTailCallOpt),
|
|
cl::init(false));
|
|
}
|
|
|
|
//---------------------------------------------------------------------------
|
|
// TargetMachine Class
|
|
//
|
|
|
|
TargetMachine::~TargetMachine() {
|
|
delete AsmInfo;
|
|
}
|
|
|
|
/// getRelocationModel - Returns the code generation relocation model. The
|
|
/// choices are static, PIC, and dynamic-no-pic, and target default.
|
|
Reloc::Model TargetMachine::getRelocationModel() {
|
|
return RelocationModel;
|
|
}
|
|
|
|
/// setRelocationModel - Sets the code generation relocation model.
|
|
void TargetMachine::setRelocationModel(Reloc::Model Model) {
|
|
RelocationModel = Model;
|
|
}
|
|
|
|
/// getCodeModel - Returns the code model. The choices are small, kernel,
|
|
/// medium, large, and target default.
|
|
CodeModel::Model TargetMachine::getCodeModel() {
|
|
return CMModel;
|
|
}
|
|
|
|
/// setCodeModel - Sets the code model.
|
|
void TargetMachine::setCodeModel(CodeModel::Model Model) {
|
|
CMModel = Model;
|
|
}
|
|
|
|
namespace llvm {
|
|
/// FiniteOnlyFPMath - This returns true when the -enable-finite-only-fp-math
|
|
/// option is specified on the command line. If this returns false (default),
|
|
/// the code generator is not allowed to assume that FP arithmetic arguments
|
|
/// and results are never NaNs or +-Infs.
|
|
bool FiniteOnlyFPMath() { return UnsafeFPMath || FiniteOnlyFPMathOption; }
|
|
|
|
/// HonorSignDependentRoundingFPMath - Return true if the codegen must assume
|
|
/// that the rounding mode of the FPU can change from its default.
|
|
bool HonorSignDependentRoundingFPMath() {
|
|
return !UnsafeFPMath && HonorSignDependentRoundingFPMathOption;
|
|
}
|
|
}
|
|
|